Engine Coolant Specifications: Thermostat
On 4 and 6-cylinder engines, thermostat is located in thermostat housing on cylinder head. On V8 engines, thermostat is located in thermostat housing on intake manifold. Test thermostat to make sure it starts to open and is fully open at specified temperatures.
Thermostat Opening Temperatures (°F)
| Application | Starts Open | Fully Open |
|---|---|---|
| 1.6L (98") 4-Cyl. | 192-197 | 212-221 |
| 2.3L (140") 4-Cyl. | 188-195 | 212 |
| 3.3L (200") 6-Cyl. | 193-200 | 212 |
| 3.8L (232") V6 | 193-200 | 221 |
| 4.2L (255") V8 | 188-195 | 221 |
| 5.0L (302") V8 | 193-200 | 221 |
| 5.8L (351") V8 | 193-200 | 221 |